Full-Stack Engineer (Ruby on Rails) - Marketing Tech 
Location: DE, BE, Berlin
Department: Engineering
Employment type: Full-time
Required experience: Associate
Required education: Master's Degree
Industry: E-Learning
Function: Engineering

Company profile:
Babbel enables anyone to learn languages in an easy and interactive way. The learning system offers 13 languages, from English to Indonesian. Users with and without previous knowledge can access grammar and thematic courses as well as vocabulary, writing and listening comprehension exercises online and on the go. In addition to the full courses for web, iOS and Android, there are also vocabulary trainer apps for Windows 8 and the Kindle Fire.Babbel is operated by Lesson Nine GmbH in Berlin. The company was founded in August 2007 and now has approximately 250 employees and freelancers and is opening an office in New York City (Lower East Side).

Job description:
We are looking for a full-time Rails Full-Stack Engineer (m/f, full-time) to start immediately in our office in Berlin-Kreuzberg, Germany.With millions of regular users and more than 7000 hours of premium content, Babbel is growing fast while we are shaping the future of learning.Our flexible cloud-based backend infrastructure consists of multiple high-performance rails services serving more than 20.000 requests per minute to users worldwide via different clients (Android, iOS, Web).You are an experienced Full-Stack developer that loves to solve challenging technical problems working together with ambitious colleagues in a fast-paced environment.Your mission will be to support our Marketing Team to optimize the technical infrastructure for user-acquisition and user-retention in close cooperation with experienced colleagues from other engineering teams.ResponsibilitiesWork in a cross-functional, agile team closely together with the Marketing team to improve user-acquisition and user-retention.Optimize tools and services for User Tracking, Data Analysis &amp; Customer Relationship ManagementIdentify and implement innovative solutions and ensure long-term stability and maintainability of our code baseEnsure code quality and participate in code reviewsEnsure browser support and compatibility across devicesTake ownership of features, work with the team and stakeholders to implement great functionality and stunning user experienceWork closely together with other engineering teams (backend, mobile, devops) to ensure seamless user experience and efficient overall architecture

Requirements:
At least 3+ years experience with the full Ruby on Rails application stackAt least 3+ years experience with Frontend technologies (JavaScript, HTML, CSS)Proven experience with Software engineering practices: TDD, unit/functional automated testing, CI, software design and architectureOpen-minded for and interested in Performance Marketing (SEM, SEO, Display Marketing, CRM, Social Media)Fluent in EnglishExperience with design and consumption of REST-based APIsPassion about Web StandardsSoftware development talent proven by great work results/experience, hobby projects or open source contributionsBonus: Experience with Tracking ServicesOPTIONAL Experience with building multi-language web applicationsOPTIONAL Experience with database backends (SQL/noSQL)

Benefits:
Tackle high volume, scaleable problems with cutting-edge technologies The potential to change how millions of users worldwide learn languagesResponsibility from day one the support to grow professionally and personallyParticipate in hackdays, technology brown-bagsWhy work at Babbel?A lively startup atmosphere with friendly working hoursLong-term prospectsA vibrant international team from over 20 different nationalitiesExcellent working conditions with a location in the heart of the Berlin sceneGreat company benefits (High-End company bike, fresh fruits &amp; drinks, Hackathons etc.)